A 19-year-old man accused of robbing a convenience store in Southeast Portland this month told officers he was trying to get cash for his brother who was on probation and owed money, according to court records.

Vladimir V. Kryshtal was arraigned today on two counts of second-degree robbery.

Fingerprints that Kryshtal left behind on a can of tea he pretended to buy helped lead to his arrest, a probable cause affidavit says.

He's accused of entering the Roll Your Own Mart in the 13700 block of Southeast Powell Blvd. on Feb. 3. He placed a can of tea on the counter and then pulled the lower part of his sweatshirt up over his face, pulled out what looked like a black handgun and told the clerk, "I'm gonna kill you. This is a robbery," according to a probable cause affidavit.

Police later searched Krysthal's home and seized clothes matching those worn in the robbery and an air soft BB gun, the affidavit says.

Kryshtal told police the BB gun was not the same one used in the robbery. He told officers he was on Xanax pills and crack cocaine at the time of the robbery, and he's written a letter of apology to the victims, the affidavit says.